read.c revision 330449
1176434Skaiw/*- 2330449Seadler * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3330449Seadler * 4176434Skaiw * Copyright (c) 2007 Kai Wang 5176434Skaiw * Copyright (c) 2007 Tim Kientzle 6176434Skaiw * All rights reserved. 7176434Skaiw * 8176434Skaiw * Redistribution and use in source and binary forms, with or without 9176434Skaiw * modification, are permitted provided that the following conditions 10176434Skaiw * are met: 11176434Skaiw * 1. Redistributions of source code must retain the above copyright 12176434Skaiw * notice, this list of conditions and the following disclaimer 13176434Skaiw * in this position and unchanged. 14176434Skaiw * 2. Redistributions in binary form must reproduce the above copyright 15176434Skaiw * notice, this list of conditions and the following disclaimer in the 16176434Skaiw * documentation and/or other materials provided with the distribution. 17176434Skaiw * 18176434Skaiw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 19176434Skaiw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20176434Skaiw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21176434Skaiw * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 22176434Skaiw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23176434Skaiw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24176434Skaiw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25176434Skaiw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26176434Skaiw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27176434Skaiw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28176434Skaiw */ 29176434Skaiw 30176434Skaiw#include <sys/cdefs.h> 31176434Skaiw__FBSDID("$FreeBSD: stable/11/usr.bin/ar/read.c 330449 2018-03-05 07:26:05Z eadler $"); 32176434Skaiw 33176434Skaiw#include <sys/queue.h> 34176434Skaiw#include <sys/stat.h> 35176434Skaiw#include <archive.h> 36176434Skaiw#include <archive_entry.h> 37176434Skaiw#include <errno.h> 38176434Skaiw#include <libgen.h> 39176434Skaiw#include <stdio.h> 40176434Skaiw#include <string.h> 41176434Skaiw#include <sysexits.h> 42176434Skaiw 43176434Skaiw#include "ar.h" 44176434Skaiw 45176434Skaiwstatic void read_archive(struct bsdar *bsdar, char mode); 46176434Skaiw 47176434Skaiwvoid 48176434Skaiwar_mode_p(struct bsdar *bsdar) 49176434Skaiw{ 50176434Skaiw 51176434Skaiw read_archive(bsdar, 'p'); 52176434Skaiw} 53176434Skaiw 54176434Skaiwvoid 55176434Skaiwar_mode_t(struct bsdar *bsdar) 56176434Skaiw{ 57176434Skaiw 58176434Skaiw read_archive(bsdar, 't'); 59176434Skaiw} 60176434Skaiw 61176434Skaiwvoid 62176434Skaiwar_mode_x(struct bsdar *bsdar) 63176434Skaiw{ 64176434Skaiw 65176434Skaiw read_archive(bsdar, 'x'); 66176434Skaiw} 67176434Skaiw 68176434Skaiw/* 69176434Skaiw * Handle read modes: 'x', 't' and 'p'. 70176434Skaiw */ 71176434Skaiwstatic void 72176434Skaiwread_archive(struct bsdar *bsdar, char mode) 73176434Skaiw{ 74176434Skaiw struct archive *a; 75176434Skaiw struct archive_entry *entry; 76176434Skaiw struct stat sb; 77176434Skaiw struct tm *tp; 78176434Skaiw const char *bname; 79176434Skaiw const char *name; 80176434Skaiw mode_t md; 81176434Skaiw size_t size; 82176434Skaiw time_t mtime; 83176434Skaiw uid_t uid; 84176434Skaiw gid_t gid; 85176434Skaiw char **av; 86176434Skaiw char buf[25]; 87176434Skaiw char find; 88176434Skaiw int flags, r, i; 89176434Skaiw 90176434Skaiw if ((a = archive_read_new()) == NULL) 91176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, 0, "archive_read_new failed"); 92201166Skientzle archive_read_support_format_ar(a); 93248612Smm AC(archive_read_open_filename(a, bsdar->filename, DEF_BLKSZ)); 94176434Skaiw 95176434Skaiw for (;;) { 96176434Skaiw r = archive_read_next_header(a, &entry); 97176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 98176434Skaiw r == ARCHIVE_FATAL) 99176434Skaiw bsdar_warnc(bsdar, 0, "%s", archive_error_string(a)); 100176434Skaiw if (r == ARCHIVE_EOF || r == ARCHIVE_FATAL) 101176434Skaiw break; 102176434Skaiw if (r == ARCHIVE_RETRY) { 103176434Skaiw bsdar_warnc(bsdar, 0, "Retrying..."); 104176434Skaiw continue; 105176434Skaiw } 106176434Skaiw 107276774Semaste if ((name = archive_entry_pathname(entry)) == NULL) 108276774Semaste break; 109176434Skaiw 110176434Skaiw /* Skip pseudo members. */ 111176434Skaiw if (strcmp(name, "/") == 0 || strcmp(name, "//") == 0) 112176434Skaiw continue; 113176434Skaiw 114176434Skaiw if (bsdar->argc > 0) { 115176434Skaiw find = 0; 116176434Skaiw for(i = 0; i < bsdar->argc; i++) { 117176434Skaiw av = &bsdar->argv[i]; 118176434Skaiw if (*av == NULL) 119176434Skaiw continue; 120176434Skaiw if ((bname = basename(*av)) == NULL) 121176434Skaiw bsdar_errc(bsdar, EX_SOFTWARE, errno, 122176434Skaiw "basename failed"); 123176434Skaiw if (strcmp(bname, name) != 0) 124176434Skaiw continue; 125176434Skaiw 126176434Skaiw *av = NULL; 127176434Skaiw find = 1; 128176434Skaiw break; 129176434Skaiw } 130176434Skaiw if (!find) 131176434Skaiw continue; 132176434Skaiw } 133176434Skaiw 134176434Skaiw if (mode == 't') { 135176434Skaiw if (bsdar->options & AR_V) { 136176434Skaiw md = archive_entry_mode(entry); 137176434Skaiw uid = archive_entry_uid(entry); 138176434Skaiw gid = archive_entry_gid(entry); 139176434Skaiw size = archive_entry_size(entry); 140176434Skaiw mtime = archive_entry_mtime(entry); 141176434Skaiw (void)strmode(md, buf); 142176434Skaiw (void)fprintf(stdout, "%s %6d/%-6d %8ju ", 143176434Skaiw buf + 1, uid, gid, (uintmax_t)size); 144176434Skaiw tp = localtime(&mtime); 145176434Skaiw (void)strftime(buf, sizeof(buf), 146176434Skaiw "%b %e %H:%M %Y", tp); 147176434Skaiw (void)fprintf(stdout, "%s %s", buf, name); 148176434Skaiw } else 149176434Skaiw (void)fprintf(stdout, "%s", name); 150176434Skaiw r = archive_read_data_skip(a); 151176434Skaiw if (r == ARCHIVE_WARN || r == ARCHIVE_RETRY || 152176434Skaiw r == ARCHIVE_FATAL) { 153176434Skaiw (void)fprintf(stdout, "\n"); 154176434Skaiw bsdar_warnc(bsdar, 0, "%s", 155176434Skaiw archive_error_string(a)); 156176434Skaiw } 157176434Skaiw 158176434Skaiw if (r == ARCHIVE_FATAL) 159176434Skaiw break; 160176434Skaiw 161176434Skaiw (void)fprintf(stdout, "\n"); 162176434Skaiw } else { 163176434Skaiw /* mode == 'x' || mode = 'p' */ 164176434Skaiw if (mode == 'p') { 165176434Skaiw if (bsdar->options & AR_V) { 166176434Skaiw (void)fprintf(stdout, "\n<%s>\n\n", 167176434Skaiw name); 168176434Skaiw fflush(stdout); 169176434Skaiw } 170176434Skaiw r = archive_read_data_into_fd(a, 1); 171176434Skaiw } else { 172176434Skaiw /* mode == 'x' */ 173176434Skaiw if (stat(name, &sb) != 0) { 174176434Skaiw if (errno != ENOENT) { 175176434Skaiw bsdar_warnc(bsdar, 0, 176176434Skaiw "stat %s failed", 177176434Skaiw bsdar->filename); 178176434Skaiw continue; 179176434Skaiw } 180176434Skaiw } else { 181176434Skaiw /* stat success, file exist */ 182176434Skaiw if (bsdar->options & AR_CC) 183176434Skaiw continue; 184176434Skaiw if (bsdar->options & AR_U && 185176434Skaiw archive_entry_mtime(entry) <= 186176434Skaiw sb.st_mtime) 187176434Skaiw continue; 188176434Skaiw } 189176434Skaiw 190176434Skaiw if (bsdar->options & AR_V) 191176434Skaiw (void)fprintf(stdout, "x - %s\n", name); 192281311Semaste /* Disallow absolute paths. */ 193281311Semaste if (name[0] == '/') { 194281311Semaste bsdar_warnc(bsdar, 0, 195281311Semaste "Absolute path '%s'", name); 196281311Semaste continue; 197281311Semaste } 198281311Semaste /* Basic path security flags. */ 199281313Semaste flags = ARCHIVE_EXTRACT_SECURE_SYMLINKS | 200281311Semaste ARCHIVE_EXTRACT_SECURE_NODOTDOT; 201176434Skaiw if (bsdar->options & AR_O) 202176434Skaiw flags |= ARCHIVE_EXTRACT_TIME; 203176434Skaiw 204176434Skaiw r = archive_read_extract(a, entry, flags); 205176434Skaiw } 206176434Skaiw 207176434Skaiw if (r) 208176434Skaiw bsdar_warnc(bsdar, 0, "%s", 209176434Skaiw archive_error_string(a)); 210176434Skaiw } 211176434Skaiw } 212176434Skaiw AC(archive_read_close(a)); 213248612Smm AC(archive_read_free(a)); 214176434Skaiw} 215